Peppermint oil is toxic if ingested in large doses. It may cause drowziness and violent vomiting. Cases of severe poisoning are rare.

Pure menthol when used in the form of an inhalant for infants may cause asphyxiation.

Preparations using 2% menthol when used as nasal drops are hazardous and may cause respiratory paralysis in infants.

Excessive ingestion of peppermint lollies have been reported to cause arrythmia of the heart. Normal heart rate is restored when ingestion of the lollies ceases.

Both peppermint oil and menthol even in low doses can cause mild allergic reactions such as rash and headaches in sensitive individuals.

Trudy Kither, is an accredited Naturopath, Nutritionist
and Herbalist who blends her Traditional Medicine
and Nutrition training with her love of creating
personalised medicines, energy healing, essential
oils, and is also a Certified Assertiveness Coach.
She has a strong connection to the natural world
and believes that nature and one’s own mind holds
the key to healing and growing stronger from living
a more natural, healthy and empowered life.